12166541321 has 8 divisors (see below), whose sum is σ = 13339966464. Its totient is φ = 11004345520.

The previous prime is 12166541293. The next prime is 12166541329. The reversal of 12166541321 is 12314566121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12166541321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12166541329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2805065 + ... + 2809398.

It is an arithmetic number, because the mean of its divisors is an integer number (1667495808).

Almost surely, 2^12166541321 is an apocalyptic number.

12166541321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12166541321 is a deficient number, since it is larger than the sum of its proper divisors (1173425143).

12166541321 is a wasteful number, since it uses less digits than its factorization.

12166541321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5614671.

The product of its digits is 8640, while the sum is 32.

The spelling of 12166541321 in words is "twelve billion, one hundred sixty-six million, five hundred forty-one thousand, three hundred twenty-one".